关于finsh shell中查根目录文件的问题

发布于 2014-09-20 17:25:30 浏览：2794 订阅该版

4 个回答

bernard 2014-09-20

这家伙很懒，什么也没写！

mickiy 2014-09-20

这家伙很懒，什么也没写！

我的情况如下。我每次程序挂载文件系统初始化，会pbuf：can't load page from flash，
ls("/")根目录查文件节点，会pbuf：can't load page from flash。。
若是子目录再查文件节点，就是0, 0x00000000

是挂载的UFFS，片外sram 4M bytes
[attach]2357[/attach]

uffs page block 分配（用系统默认的），nandflash为128M bytes。

代码

```

#ifndef _UFFS_CONFIG_H_
#define _UFFS_CONFIG_H_
#define UFFS_MAX_PAGE_SIZE		2048

/**
 * def UFFS_MAX_SPARE_SIZE
 */
#define UFFS_MAX_SPARE_SIZE ((UFFS_MAX_PAGE_SIZE / 256) * 8)

/**
 * def UFFS_MAX_ECC_SIZE
 */
#define UFFS_MAX_ECC_SIZE  ((UFFS_MAX_PAGE_SIZE / 256) * 5)

/**
 * def MAX_CACHED_BLOCK_INFO
 * 
ote uffs cache the block info for opened directories and files,
 *       a practical value is 5 ~ MAX_OBJECT_HANDLE
 */
#define MAX_CACHED_BLOCK_INFO	50

/** 
 * def MAX_PAGE_BUFFERS
 * 
ote the bigger value will bring better read/write performance.
 *       but few writing performance will be improved when this 
 *       value is become larger than 'max pages per block'
 */
#define MAX_PAGE_BUFFERS		40

/** 
 * def CLONE_BUFFER_THRESHOLD
 * 
ote reserve buffers for clone. 1 or 2 should be enough.
 */
#define CLONE_BUFFERS_THRESHOLD	2

/**
 * def MAX_SPARE_BUFFERS
 * 
ote spare buffers are used for lower level flash operations,
 *		 5 should be enough.
 */
#define MAX_SPARE_BUFFERS		5

/**
 * def MAX_DIRTY_PAGES_IN_A_BLOCK 
 * 
ote this value should be between '2' and the lesser of
 *		 'max pages per block' and (MAX_PAGE_BUFFERS - CLONE_BUFFERS_THRESHOLD - 1).
 *
 *       the smaller the value the frequently the buffer will be flushed.
 */
#define MAX_DIRTY_PAGES_IN_A_BLOCK 32

/**
 * def MAX_DIRTY_BUF_GROUPS
 */
#define MAX_DIRTY_BUF_GROUPS	3

/**
 * def CONFIG_ENABLE_UFFS_DEBUG_MSG
 * 
ote Enable debug message output. You must call uffs_InitDebugMessageOutput()
 *      to initialize debug apart from enable debug feature.
 */
#define CONFIG_ENABLE_UFFS_DEBUG_MSG

/**
 * def CONFIG_USE_GLOBAL_FS_LOCK
 * 
ote use global lock instead of per-device lock.
 *       this is required if you use fd APIs in multi-thread environment.
 */
#define CONFIG_USE_GLOBAL_FS_LOCK

/**
 * def CONFIG_USE_PER_DEVICE_LOCK
 * 
ote use per-device lock.
 *		 this is required if you use fs APIs in multi-thread environment.
 */
//#define CONFIG_USE_PER_DEVICE_LOCK

/**
 * def CONFIG_USE_STATIC_MEMORY_ALLOCATOR
 * 
ote uffs will use static memory allocator if this is defined.
 *       to use static memory allocator, you need to provide memory
 *       buffer when creating uffs_Device.
 *
 *       use UFFS_STATIC_BUFF_SIZE() to calculate memory buffer size.
 */
#define CONFIG_USE_STATIC_MEMORY_ALLOCATOR 0

/**
 * def CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR
 * 
ote  using system platform's 'malloc' and 'free'.
 */
#define CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR 1

/** 
 * def CONFIG_FLUSH_BUF_AFTER_WRITE
 * 
ote UFFS will write all data directly into flash in 
 *       each 'write' call if you enable this option.
 *       (which means lesser data lost when power failure but
 *		 poorer writing performance).
 *		 It's not recommended to open this define for normal applications.
 */
#define CONFIG_FLUSH_BUF_AFTER_WRITE

/**
 * def CONFIG_UFFS_AUTO_LAYOUT_MTD_COMP
 * 
ote Use Linux MTD compatiable spare placement for UFFS_LAYOUT_AUTO,
 *       only valid for page data size 512 or 2048.
 */
//#define CONFIG_UFFS_AUTO_LAYOUT_USE_MTD_SCHEME

/** 
 * def MAX_OBJECT_HANDLE
 * maximum number of object handle 
 */
#define MAX_OBJECT_HANDLE	50
#define FD_SIGNATURE_SHIFT	6

/**
 * def MAX_DIR_HANDLE
 * maximum number of uffs_DIR
 */
#define MAX_DIR_HANDLE 10

/**
 * def MINIMUN_ERASED_BLOCK
 *  UFFS will not allow appending or creating new files when the free/erased block
 *  is lower then MINIMUN_ERASED_BLOCK.
 */
#define MINIMUN_ERASED_BLOCK 2

```

[attach]2358[/attach]